CTS V8-5.7L VIN P (2004)
-
SP300 located in the left side middle of the passenger compartment, taped to the body harness, near the carpet seam.
-
SP200 located in the center of the instrument panel, near the radio.
The following devices are connected to the class 2 serial data circuit in star fashion via splice packs:
-
SP201 - The DLC
-
SP303
-
The right rear door module (RRDM)
-
The radio antenna module
-
The TV antenna module
-
The vehicle communication interface module (VCIM)
-
The rear integration module (RIM)
-
The memory seat module (MSM) w/A45
-
The driver door module (DDM)
-
The driver door switch assembly (DDSA)
-
SP300
-
The audio amplifier
-
The left rear door module (LRDM)
-
The front passenger door module (FPDM)
-
SP200 - The theft deterrent control module
Right Hand Drive (RHD) Class 2 Loop
Refer to Data Link Connector (DLC) Schematics and the illustration in order to familiarize yourself with the architecture of the class 2 serial data
circuit:
CONTROLLER AREA NETWORK (CAN) SERIAL DATA LINE W/M82
The Controller Area Network (CAN) serial data line does not communicate with the scan tool via the data link connector (DLC). CAN serial data
information is interpreted by the engine control module (ECM) and transmitted to the class 2 serial data line by the ECM. The following modules
communicate on the CAN serial data line:
-
The ECM w/LA3/LY9
-
The TCM w/LA3/LY9
The CAN serial data line is high speed serial data bus used to communicate information between the engine control module (ECM) and the
transmission control module (TCM). Typical data-transmission speeds must be high enough to ensure that the required real-time response is
maintained.
The addressing scheme employed with CAN assigns a label to every message, with each message receiving a unique identifier. The identifier classifies
the content of the message. Each module processes only those messages whose identifiers are stored in the module's acceptance list. This is CAN's
form of message filtering.